Leveling agentssiv nyob rau hauv cov txheej txheem feem ntau muab faib ua cov kuab tshuaj sib xyaw, acrylic acid, silicone, fluorocarbon polymers thiab cellulose acetate. Vim nws cov yam ntxwv tsis tshua muaj qhov nro, cov neeg ua haujlwm qib tsis tuaj yeem pab cov txheej txheem rau qib, tab sis kuj tseem tuaj yeem ua rau muaj kev phiv. Thaum siv, qhov kev xav tseem ceeb yog qhov cuam tshuam tsis zoo ntawm cov neeg ua hauj lwm qib ntawm cov khoom siv rov qab thiab cov khoom tiv thaiv kab mob ntawm cov txheej txheem, thiab kev sib raug zoo ntawm cov neeg ua hauj lwm qib xaiv yuav tsum tau sim los ntawm kev sim.

1. Mixed solvent leveling agent

Nws yog tsim los ntawm high-boiling-point aromatic hydrocarbon cov kuab tshuaj, ketones, esters los yog cov kuab tshuaj zoo heev ntawm ntau pawg ua haujlwm, thiab cov kuab tshuaj kub-kua sib tov. Thaum npaj thiab siv, yuav tsum tau them nyiaj mloog mus rau nws tus nqi volatilization, volatilization tshuav nyiaj li cas thiab solubility, yog li ntawd lub txheej muaj qhov nruab nrab hnyav volatility tus nqi thiab solubility thaum lub sij hawm ziab. Yog tias tus nqi volatilization tsawg dhau, nws yuav nyob twj ywm hauv cov xim pleev xim rau lub sijhawm ntev thiab tsis tuaj yeem tso tawm, uas yuav cuam tshuam rau hardness ntawm cov xim zaj duab xis.

Hom leveling tus neeg sawv cev no tsuas yog tsim nyog rau kev txhim kho qhov tsis xws luag (xws li shrinkage, whitening, thiab tsis zoo gloss) tshwm sim los ntawm kev ziab sai heev ntawm txheej txheej hnyav thiab tsis zoo solubility ntawm cov khoom hauv paus. Qhov ntau npaum yog 2% ~ 7% ntawm tag nrho cov xim. Nws yuav ncua lub sij hawm ziab ntawm txheej. Rau chav tsev kub kom qhuav coatings (xws li nitro xim) uas muaj sagging thaum thov rau ntawm lub façade, nws tsis tsuas yog pab nrog leveling, tab sis kuj pab txhim kho gloss. Thaum lub sij hawm ziab, nws tseem tuaj yeem tiv thaiv cov npuas thiab cov pinholes los ntawm cov evaporation ceev heev ntawm cov kuab tshuaj. Tshwj xeeb tshaj yog thaum siv nyob rau hauv qhov kub thiab txias huab cua, nws muaj peev xwm tiv thaiv cov xim zaj duab xis nto los ntawm qhuav tawm ntxov ntxov, muab ib tug uniform hnyav volatilization nkhaus, thiab tiv thaiv qhov tshwm sim ntawm dawb pos huab nyob rau hauv nitro xim. Hom leveling tus neeg sawv cev no feem ntau yog siv nrog rau lwm tus neeg ua haujlwm leveling.

2. Acrylic leveling agents

Hom tshuaj leveling no feem ntau yog copolymer ntawm acrylic esters. Nws cov yam ntxwv yog:

(1) Cov alkyl ester ntawm acrylic acid muab cov kev ua haujlwm saum npoo av;

(2) Nws—COOJ,—OH, thiab—NR tuaj yeem pab kho qhov sib haum ntawm alkyl ester qauv;

(3) Tus txheeb ze molecular hnyav yog ncaj qha ntsig txog qhov kawg kis tau zoo. Kev sib raug zoo tseem ceeb thiab kev teeb tsa cov saw hlau ntawm polyacrylate yog qhov tsim nyog rau kev ua tus neeg sawv cev tsim nyog. Nws ua tau leveling mechanism yog manifested nyob rau hauv lub tom ntej theem;

(4) Nws nthuav tawm cov khoom tiv thaiv ua npuas thiab defoaming hauv ntau lub tshuab;

(5) Tsuav yog muaj cov pab pawg me me (xws li -OH, -COOH) nyob rau hauv tus neeg sawv cev theem, qhov cuam tshuam ntawm cov txheej txheem rov qab yuav luag tsis pom, tab sis tseem muaj peev xwm cuam tshuam rau kev rov ua dua tshiab;

(6) Kuj tseem muaj qhov teeb meem ntawm kev sib txuam polarity thiab compatibility, uas kuj yuav tsum tau xaiv kev sim.

3. Silicone leveling tus neeg saib xyuas

Silicones yog ib hom polymer nrog silicon-oxygen bond saw (Si-O-Si) raws li cov pob txha thiab cov organic pawg txuas nrog silicon atoms. Feem ntau cov khoom siv silicone muaj cov hlua sab nraud nrog lub zog qis, yog li silicone molecules muaj lub zog qis heev thiab qhov nro qis heev.

Feem ntau siv polysiloxane additive yog polydimethylsiloxane, tseem hu ua methyl silicone roj. Nws lub ntsiab siv yog raws li ib tug defoamer. Cov qauv qis molecular hnyav muaj txiaj ntsig zoo hauv kev txhawb nqa qib, tab sis vim muaj teeb meem loj sib xws, lawv feem ntau ua rau shrinkage lossis tsis muaj peev xwm rov ua dua. Yog li ntawd, polydimethylsiloxane yuav tsum tau hloov kho ua ntej nws tuaj yeem siv nyab xeeb thiab siv tau zoo hauv txheej txheej.

Cov kev hloov kho tseem ceeb yog: polyether hloov silicone, alkyl thiab lwm pab pawg hloov kho silicone, polyester hloov silicone, polyacrylate hloov silicone, fluorine hloov silicone. Muaj ntau txoj kev hloov kho rau polydimethylsiloxane, tab sis tag nrho cov ntawm lawv yog tsom rau kev txhim kho nws compatibility nrog coatings.

Hom tshuaj leveling no feem ntau muaj ob qho tib si leveling thiab defoaming teebmeem. Nws compatibility nrog txheej yuav tsum tau txiav txim los ntawm kev ntsuam xyuas ua ntej siv.

4.Cov ntsiab lus tseem ceeb rau kev siv

Xaiv hom zoo: Xaiv tus neeg sawv cev zoo raws li hom thiab kev ua haujlwm ntawm txheej txheej. Thaum xaiv tus neeg sawv cev theem, nws cov khoom muaj pes tsawg leeg thiab cov khoom zoo li nws txoj kev sib raug zoo nrog cov txheej txheem nws tus kheej yuav tsum raug txiav txim siab; Nyob rau tib lub sijhawm, ntau tus neeg sawv cev los yog lwm yam tshuaj ntxiv feem ntau yog siv los ua ke kom sib npaug ntau yam teeb meem.

Ua tib zoo saib xyuas cov nyiaj ntxiv: ntau ntxiv yuav ua rau muaj teeb meem xws li shrinkage thiab sagging ntawm txheej txheej, thaum me me ntxiv yuav tsis ua tiav cov nyhuv leveling. Feem ntau, cov nyiaj ntxiv yuav tsum tau txiav txim siab raws li qhov xav tau ntawm cov viscosity thiab qib ntawm cov txheej txheem, ua raws li cov lus qhia rau kev siv cov reagent, thiab muab cov txiaj ntsig kev sim tiag tiag.

Txheej txheej: Kev ua tau zoo ntawm cov txheej txheej yog cuam tshuam los ntawm txheej txheej txheej. Thaum siv tus neeg sawv cev leveling, koj tuaj yeem siv txhuam, cov menyuam txheej los yog tshuaj tsuag kom muab tag nrho cov kev ua si rau lub luag haujlwm ntawm tus neeg sawv cev leveling.

stirring: Thaum siv tus neeg sawv cev theem, cov xim yuav tsum tau nplawm tag nrho kom tus neeg sawv cev sib npaug sib npaug hauv cov xim. Lub sijhawm nplawm yuav tsum tau txiav txim siab raws li tus yam ntxwv ntawm tus neeg sawv cev, feem ntau tsis tshaj 10 feeb.

Nanjing Reborn New Materials muab ntau yamleveling agentssuav nrog Organo Silicone ones thiab Non-silicon ones rau txheej. Sib piv BYK series.